Let me give you a little background. This is a webserver which has
some mapped drives users can connect to. We have 3 domains in this
network, DEMONIC, HELLSGATE, 7SINS. I am able to map the drives
authenticating against DEMONIC and HELLSGATE but not to 7SINS. Below
is my configuration.

Now I know kerberos is working. I am again to receive tickets from all
domains, and I can use those tickets to authenticate to the different
domains. I've tested this by using smbclient -L {server} -k. A 7SINS
user can connect to a DEMONIC, 7SINS, HELLSGATE server and vice versa.
When I run klist, I see cross domain tickets for all the domains after
I initally connect to a server on which ever domain.

When I try to map a drive to caotasaweb02\jnk using a DEMONIC or
HELLSGATE account I have no issues but when I use a nam account I get
this: